#2

5x5
0 -1 0 1 0
0 0 0 1 0
0 -1 1 0 0
1 0 0 0 0
0 0 -1 0 2

5x5
0 1 0 0 1
0 0 0 1 1
0 0 1 0 1
1 0 0 0 0
0 -1 -1 -1 1

dim5/3;1,1a

